691332-03-3

Basic information

• Product Name: 1'-hydroxy-5,4',5'-trimethoxy-7,7'-dimethyl[2,2']binaphthalenyl-1,4-dione
• Synonyms: 1'-hydroxy-5,4',5'-trimethoxy-7,7'-dimethyl[2,2']binaphthalenyl-1,4-dione
• CAS NO: 691332-03-3
• Molecular Weight: 418.446
• Mol File: 691332-03-3.mol

Chemical Properties

• CAS DataBase Reference: 1'-hydroxy-5,4',5'-trimethoxy-7,7'-dimethyl[2,2']binaphthalenyl-1,4-dione(CAS DataBase Reference)
• NIST Chemistry Reference: 1'-hydroxy-5,4',5'-trimethoxy-7,7'-dimethyl[2,2']binaphthalenyl-1,4-dione(691332-03-3)
• EPA Substance Registry System: 1'-hydroxy-5,4',5'-trimethoxy-7,7'-dimethyl[2,2']binaphthalenyl-1,4-dione(691332-03-3)

Safety Data

• Hazardous Substances Data: 691332-03-3(Hazardous Substances Data)

Upstream product

• 100-39-0 benzyl bromide 
• 75445-82-8 4,5-dimethoxy-7-methylnaphthalen-1-ol 

Relevant articles and documents

Semiconductor-mediated oxidative dimerization of 1-naphthols with dioxygen and O-demethylation of the enol-ethers by SnO2 without dioxygen

Oxidative dimerization of 1-naphthols 1 with dioxygen in the presence of a semiconductor, such as SnO2, ZrO2, or activated charcoal, as a catalytic mediator takes place selectively to give the corresponding 2,2′-binaphthols 2 or 2,2′-binaphthyl-1,1′-quinones 3 in excellent yields without light irradiation. The catalytic activity of SnO 2 could be fully restored by appropriate reactivation treatment after the oxidation. In addition, SnO2 without dioxygen catalyzes selective O-demethylation of the enol-ethers 3 to 4. Graphical Abstract.

Efficient oxidative dimerization of 1-naphthols to 2,2′-binaphthyls with dioxygen mediated by semiconductors

A novel and efficient oxidative dimerization of 1-naphthols 1 with dioxygen in the presence of several semiconductors including SnO2, ZrO2, and activated charcoal as catalytic mediators took place selectively to give the corresponding 2,2′-binaphthols 2 or 2,2′-binaphthyl-1,1′-quinones 3 in excellent yields without light irradiation. Among these semiconductors, the catalytic activity of SnO 2 could be fully restored by appropriate reactivation treatment after oxidation. The products 2 and 3 should be useful as synthetic intermediates for natural binaphthyls.